The A-League is a professional men's soccer league run by Football Federation Australia (FFA).
At the top of the Australian league system, it is the country's primary competition for the sport.
The A-League was established in 2004 as a successor to the National Soccer League (NSL) and competition commenced in August 2005.
Successful A-League clubs gain qualification into the continental competition, the Asian Football Confederation Champions League (ACL) also known as "AFC Champions League".